Which of the following is a function of those spindle microtubules that do not attach to kinetochores?

A)maintaining an appropriate spacing among the moving chromosomes
B)producing a cleavage furrow when telophase is complete
C)providing the ATP needed by the fibres attached to kinetochores
D)maintaining the region of overlap of microtubules in the cell's center
E)pulling the poles of the spindles closer to one another